Wired reports the update will provide a fix to WebKit, the system behind Apple’s Safari internet browser, as well as the App Store. Vulnerabilities in the system could allow an attacker to execute a command to take control of the device.

Hackers have not yet been able to crack into an iPhone, and Apple hopes to keep it that way.

Users are encouraged to update their phone as soon as they can. To update your iPhone or iPad, make sure your phone is plugged in and connected to Wi-Fi, then go to Settings > General > Software Update to download and install.